How long did it take Samuel to succeed in transmit...

B

- Hướng dẫn giải

Phương pháp giải:

Giải chi tiết:

B

Samuael mất bao lâu để thành công trong việc truyền tín hiệu Morse? -> 12 năm( 1844-1832=12)

“ He first had the idea of trying to develop the telegraph in 1832, on board a ship returning to America from Europe.It took eleven long years of ridicule by his associates, disinterest by the public, and a shortage of funds before Congress finally allocated $30,000 to Morse 15 for his project. With these funds, Morse hung a telegraph line from Washington, D.C to Baltimore, and on May 24, 1844, a message in the dots and dashes of Morse Code was successfully transmitted.”